====== WSUS Updates Powershell ======

Mit diesem Script werden so lange Updates intstalliert bis keine mehr vorliegen. Die Updates werden nur nach 19 Uhr und vor 7 Uhr installiert um den User nicht an der Anmeldung zu hindern. Aussnahme: Der Rechner wurde neu installiert, dann werden unabhängig von der Uhrzeit alle Updates installiert. Mit dem ONCE Script werden immer alle Updates installiert, unabhängig von der Tageszeit.

Voraussetzungen: Powershell Version >= 4.0

Getestet unter Windows 7 x64 SP1

Logging des Scriptes erfolgt in C:\tmp\windows-update-opsi.log

Ordnerstruktur:

CLIENT_DATA
  * install-updates.ps1
  * install-updates-once.ps1
  * once64.ins
  * setup64.ins
  * windows_update_icon.png (nur fürs gute Aussehen)

OPSI
  * control

setup64.ins

<code winst>
; Copyright (c) uib gmbh (www.uib.de)
; This sourcecode is owned by uib
; and published under the Terms of the General Public License.
; credits: http://www.opsi.org/en/credits/
; comment

[Actions]
requiredWinstVersion >= "4.11.4.7"
AutoActivityDisplay = true
StayOnTop = false

DefVar $LogDir$
DefVar $ProductId$  
DefVar $MinimumSpace$
DefVar $ExitCode$

Set $LogDir$ = "%SystemDrive%\tmp"

; ----------------------------------------------------------------
; - Please edit the following values                             -
; ----------------------------------------------------------------
;$ProductId$ should be the name of the product in opsi
; therefore please: only lower letters, no umlauts, 
; no white space use '-' as a seperator
Set $ProductId$       = "install-windows-updates"
Set $MinimumSpace$    = "500 MB"
; ----------------------------------------------------------------

if not(HasMinimumSpace ("%SystemDrive%", $MinimumSpace$))
	LogError "Not enough space on %SystemDrive%, " + $MinimumSpace$ + " on drive %SystemDrive% needed for " + $ProductId$
	isFatalError
	; Stop process and set installation status to failed
else
	comment "Show product picture"
	ShowBitmap "%ScriptPath%\windows_update_icon.png" "Windows Update"

        Files_Install /Sysnative
	Message "Installiere Windows Updates. Dies kann mehrere Stunden dauern."
	DosInAnIcon_WindowsUpate
	Sub_check_exitcode

endif

[Files_Install]
CheckTargetPath = "%Systemdrive%\tmp"
copy -u "%ScriptPath%\install-updates.ps1" "%Systemdrive%\tmp\"

[DosInAnIcon_WindowsUpate]
"%SystemRoot%\Sysnative\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy ByPass -command "& { "%Systemdrive%\tmp\install-updates.ps1"; exit $lastexitcode }"

[Sub_check_exitcode]
comment "Test for installation success via exit code"
set $ExitCode$ = getLastExitCode
; informations to exit codes see
; http://msdn.microsoft.com/en-us/library/aa372835(VS.85).aspx
; http://msdn.microsoft.com/en-us/library/aa368542.aspx
if ($ExitCode$ = "0")
	comment "Looks good: setup program gives exitcode zero"
else
	comment "Setup program gives a exitcode unequal zero: " + $ExitCode$
	if ($ExitCode$ = "1605")
		comment "ERROR_UNKNOWN_PRODUCT	1605	This action is only valid for products that are currently installed."
		comment "Uninstall of a not installed product failed - no problem"
	else
		if ($ExitCode$ = "1641")
			comment "looks good: setup program gives exitcode 1641"
			comment "ERROR_SUCCESS_REBOOT_INITIATED	1641	The installer has initiated a restart. This message is indicative of a success."
		else
			if ($ExitCode$ = "3010")
				comment "looks good: setup program gives exitcode 3010"
				comment "ERROR_SUCCESS_REBOOT_REQUIRED	3010	A restart is required to complete the install. This message is indicative of a success."
				ExitWindows /ImmediateReboot
			else
				logError "Fatal: Setup program gives an unknown exitcode unequal zero: " + $ExitCode$
				isFatalError
			endif
		endif
	endif
endif
</code>

once64.ins
<code winst>
; Copyright (c) uib gmbh (www.uib.de)
; This sourcecode is owned by uib
; and published under the Terms of the General Public License.
; credits: http://www.opsi.org/en/credits/
; comment

[Actions]
requiredWinstVersion >= "4.11.4.7"
AutoActivityDisplay = true
StayOnTop = false

DefVar $LogDir$
DefVar $ProductId$  
DefVar $MinimumSpace$
DefVar $ExitCode$

Set $LogDir$ = "%SystemDrive%\tmp"

; ----------------------------------------------------------------
; - Please edit the following values                             -
; ----------------------------------------------------------------
;$ProductId$ should be the name of the product in opsi
; therefore please: only lower letters, no umlauts, 
; no white space use '-' as a seperator
Set $ProductId$       = "install-windows-updates"
Set $MinimumSpace$    = "500 MB"
; ----------------------------------------------------------------

if not(HasMinimumSpace ("%SystemDrive%", $MinimumSpace$))
	LogError "Not enough space on %SystemDrive%, " + $MinimumSpace$ + " on drive %SystemDrive% needed for " + $ProductId$
	isFatalError
	; Stop process and set installation status to failed
else
	comment "Show product picture"
	ShowBitmap "%ScriptPath%\windows_update_icon.png" "Windows Update"

        Files_Install /Sysnative
	Message "Installiere Windows Updates. Dies kann mehrere Stunden dauern."
	DosInAnIcon_WindowsUpate
	Sub_check_exitcode

endif

[Files_Install]
CheckTargetPath = "%Systemdrive%\tmp"
copy -u "%ScriptPath%\install-updates-once.ps1" "%Systemdrive%\tmp\"

[DosInAnIcon_WindowsUpate]
"%SystemRoot%\Sysnative\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass -command "& { "%Systemdrive%\tmp\install-updates-once.ps1"; exit $lastexitcode }"

[Sub_check_exitcode]
comment "Test for installation success via exit code"
set $ExitCode$ = getLastExitCode
; informations to exit codes see
; http://msdn.microsoft.com/en-us/library/aa372835(VS.85).aspx
; http://msdn.microsoft.com/en-us/library/aa368542.aspx
if ($ExitCode$ = "0")
	comment "Looks good: setup program gives exitcode zero"
else
	comment "Setup program gives a exitcode unequal zero: " + $ExitCode$
	if ($ExitCode$ = "1605")
		comment "ERROR_UNKNOWN_PRODUCT	1605	This action is only valid for products that are currently installed."
		comment "Uninstall of a not installed product failed - no problem"
	else
		if ($ExitCode$ = "1641")
			comment "looks good: setup program gives exitcode 1641"
			comment "ERROR_SUCCESS_REBOOT_INITIATED	1641	The installer has initiated a restart. This message is indicative of a success."
		else
			if ($ExitCode$ = "3010")
				comment "looks good: setup program gives exitcode 3010"
				comment "ERROR_SUCCESS_REBOOT_REQUIRED	3010	A restart is required to complete the install. This message is indicative of a success."
				ExitWindows /ImmediateReboot
			else
				logError "Fatal: Setup program gives an unknown exitcode unequal zero: " + $ExitCode$
				isFatalError
			endif
		endif
	endif
endif
</code>

control

<code>
[Package]
version: 19
depends: 
incremental: False

[Product]
type: localboot
id: install-windows-updates
name: Updates für Windows installieren
description: 
advice: 
version: 4.0
priority: -80
licenseRequired: False
productClasses: 
setupScript: setup64.ins
uninstallScript: 
updateScript: 
alwaysScript: 
onceScript: once64.ins
customScript: 
userLoginScript: 
</code>

install-updates.ps1

<code>
function Write-Log
{
    [CmdletBinding()]
    param(
        [Parameter(Mandatory=$True,ValueFromPipeline=$True)]
        [Array[]]$logstring
    )
    foreach ($string in $logstring) {
        $nowDate = Get-Date -Format dd.MM.yyyy
        $nowTime = Get-Date -Format HH:mm:ss
        Write-Host $nowDate $nowTime $string
        Add-Content -LiteralPath $LogPath -Value "$nowDate $nowTime $string"
    }
}

function Get-Timewindow
{
    $Now = Get-Date
    if (($Now.Hour -ge 7) -and ($Now.Hour -le 19))
    {
        Write-Log 'It is daytime. Check if System was just getting installed.'
        $InstallDate = ([WMI]'').ConvertToDateTime((Get-WmiObject Win32_OperatingSystem).InstallDate)
        $OneDay = New-TimeSpan -Days 1

        if ((($Now) -$InstallDate) -lt $OneDay)
        {
            Write-Log 'OS installation time is not older than 1 day. Windows Updates must be installed. Continue...'
        }
        else
        {
            Write-Log 'OS installation time is older than 1 day. Doing nothing because its day.'
            Write-Log '***** END *****'
            exit 0
        }
    }
    else
    {
        Write-Log 'It is night. Continue...'
    }
}

function Get-Rebootrequired
{
    $objSystemInfo= New-Object -ComObject 'Microsoft.Update.SystemInfo'
    $RebootRequired = $objSystemInfo.RebootRequired
    if ($RebootRequired -eq $true)
    {
        Write-Log 'Need to reboot, rebooting...'
        exit 3010
    }
    else
    {
        Write-Log 'No need to reboot.'
    }			
}

function Get-InstallerStatus {
    $Busy = $true
    $lastWriteTimeCBSLos = (Get-Item C:\Windows\Logs\CBS\CBS.log).LastWriteTime
    $TimespanOneMinute = New-TimeSpan -Minutes 1
    while ($Busy -eq $true)
    {
        if (((Get-Date) -$lastWriteTimeCBSLos) -gt $TimespanOneMinute) {
            $Busy = $false
        }
        else {
            Write-Log 'Waiting for Trusted Installer...'
            Start-Sleep -Seconds 10
        }
    }
    
}


$LogPath = "$env:SystemDrive\tmp\windows-update-opsi.log"
$FirstRun = Test-Path -Path $LogPath

Write-Log '***** START *****'

Get-Timewindow
Get-Rebootrequired
Get-InstallerStatus

Write-Log 'Searching for new Updates...'

#GUI bauen
[System.Windows.Forms.Application]::EnableVisualStyles()
Add-Type -AssemblyName System.Windows.Forms
$Form = New-Object system.Windows.Forms.Form
$Form.Text = 'Windows-Update-Status'
$Form.Width = 430
$Form.Height = 100
$Form.TopMost = $True
$Form.AutoSizeMode = 'GrowAndShrink'
$Form.MinimizeBox = $False
$Form.MaximizeBox = $False
$Form.WindowState = 'Normal'
$Form.SizeGripStyle = 'Hide'
$Form.ShowInTaskbar = $False
$Form.StartPosition = 'CenterScreen'
$Font = New-Object System.Drawing.Font('Arial',12)
$Form.Font = $Font
$Label = New-Object System.Windows.Forms.Label
$Label.Text = 'Suche nach Windows Updates...'
$Label.AutoSize = $True
$Form.Controls.Add($Label)
$Form.Show()
$Form.Focus()

$Session= New-Object -ComObject Microsoft.Update.Session
$Searcher= $Session.CreateUpdateSearcher()

$SearchResults = $Searcher.Search("IsInstalled=0 and Type='Software'").Updates
if ($SearchResults.Count -eq 0 -and $FirstRun -eq $true)
{
    Write-Log 'No Updates found.'
    Write-Log '***** END *****'
    $Label.Text = 'Keine neuen Updates gefunden.'
    $Form.Refresh()
    Start-Sleep -Seconds 5
    $Form.Close()
    exit 0
}

if ($SearchResults.Count -eq 0 -and $FirstRun -eq $false)
{
    Write-Log 'No Updates found, but it is the first time to search for updates. Reboot!'
    Write-Log '***** END *****'
    $Label.Text = 'Keine Updates gefunden, neuer Versuch...'
    $Form.Refresh()
    Start-Sleep -Seconds 5
    $form.Close()
    exit 3010
}

foreach ($Update in $SearchResults) {
    $TotalUpdateSize = $Update.MaxDownloadSize + $TotalUpdateSize
    Write-Log "Found KB$($update.KBArticleIDs), Size: $([math]::Round($($update.MaxDownloadSize/1MB),2).ToString('0.00').PadLeft(6)) MB, Title: $($update.Title)"
}

Write-Log "Summary: $($SearchResults.Count) new Update(s), $($($TotalUpdateSize/1MB).ToString('0.00')) MB to download."
$Label.Text = "$($SearchResults.Count) neue Update(s) gefunden."
$Form.Refresh()
Start-Sleep -Seconds 5
Write-Log 'Starting Download...'
$Label.Text = 'Starte Download.'
$Form.Refresh()
Start-Sleep -Seconds 5

# ProgressBar bauen
$ProgressBarSize = New-Object System.Drawing.Size
$ProgressBarSize.Width = 400
$ProgressBarSize.Height = 20
$ProgressBar = New-Object System.Windows.Forms.ProgressBar
$ProgressBar.Left = 5
$ProgressBar.Top = 35
$ProgressBar.Style = 'Continuous'
$ProgressBar.Value = 0
$ProgressBar.Size = $ProgressBarSize
$Form.Controls.Add($ProgressBar)

$ProgressInPercent = 0
$DownloadCount = 0
$DownloadSuccessCounter = 0
$DownloadFailedCounter = 0

foreach ($DownloadItem in $SearchResults)
{
    $DownloadCount++
    $Downloader = $Session.CreateUpdateDownloader()
    $DownloadItems = New-Object -ComObject Microsoft.Update.UpdateColl
    $DownloadItems.Add($DownloadItem)
    $Downloader.Updates = $DownloadItems
    $DownloadResult = $Downloader.Download()
    if ($DownloadResult.ResultCode -eq 2) {
        $DownloadSuccessCounter++
        Write-Log "Successfully downloaded Update $DownloadCount of $($SearchResults.Count), KB$($DownloadItem.KBArticleIDs), Size: $(($DownloadItem.MaxDownloadSize/1MB).ToString('0.00')) MB, Title: $($DownloadItem.Title)"
        $ProgressInPercent = ($DownloadCount / $($SearchResults.Count))*100
        $ProgressBar.Value = $ProgressInPercent
        $Label.Text = "Download $DownloadCount von $($SearchResults.Count) erfolgreich."
        $Form.Refresh()
    }
    else {
        $DownloadFailedCounter++
        Write-Log "Failed downloading Update $DownloadCount of $($SearchResults.Count), KB$($DownloadItem.KBArticleIDs), Title: $($DownloadItem.Title)"
        $ProgressInPercent = ($DownloadCount / $($SearchResults.Count))*100
        $ProgressBar.Value = $ProgressInPercent
        $Label.Text = "Download $DownloadCount von $($SearchResults.Count) fehlgeschlagen."
        $Form.Refresh()

    }
}
Write-Log "Summary: Successfully downloaded $DownloadSuccessCounter Updates, failed to download $DownloadFailedCounter Updates."

Write-Log 'Starting Install...'
$ProgressBar.Value = 0
$Label.Text = 'Starte Installation...'
$Form.Refresh()

$InstallCount = 0
$InstallSuccessCounter = 0
$InstallFailedCounter = 0
foreach ($InstallItem in $SearchResults)
{
    $InstallCount++
    $Installer = $Session.CreateUpdateInstaller()
    $InstallerItems = New-Object -ComObject Microsoft.Update.UpdateColl
    $InstallerItems.Add($InstallItem)
    $Installer.Updates = $InstallerItems
    $InstallResult = $Installer.Install()
    if ($InstallResult.ResultCode -eq 2) {
        $InstallSuccessCounter++
        Write-Log "Successfully installed Update $InstallCount of $($SearchResults.Count), KB$($InstallItem.KBArticleIDs), Title: $($InstallItem.Title)"
        $ProgressInPercent = ($InstallCount / $($SearchResults.Count))*100
        $ProgressBar.Value = $ProgressInPercent
        $Label.Text = "Update $InstallCount von $($SearchResults.Count) erfolgreich installiert."
        $Form.Refresh()
    }
    else {
        $InstallFailedCounter++
        Write-Log "Failed installing Update $InstallCount of $($SearchResults.Count), KB$($InstallItem.KBArticleIDs), Title: $($InstallItem.Title)"
        $ProgressInPercent = ($InstallCount / $($SearchResults.Count))*100
        $ProgressBar.Value = $ProgressInPercent
        $Label.Text = "Update $InstallCount von $($SearchResults.Count) fehlgeschlagen."
        $Form.Refresh()
    }
}
Write-Log "Summary: Successfully installed $InstallSuccessCounter Updates, failed to install $InstallFailedCounter Updates."
Write-Log 'Rebooting...'
Write-Log '***** END *****'
$Label.Text = "$InstallSuccessCounter Updates erfolgreich, $InstallFailedCounter Updates fehlgeschlagen."
$Form.Refresh()
Start-Sleep -Seconds 5
$Label.Text = 'Neustart des Systems'
$Form.Refresh()
Start-Sleep -Seconds 5
$Form.Close()
exit 3010
</code>

install-updates-once.ps1

<code>
function Write-Log
{
    [CmdletBinding()]
    param(
        [Parameter(Mandatory=$True,ValueFromPipeline=$True)]
        [Array[]]$logstring
    )
    foreach ($string in $logstring) {
        $nowDate = Get-Date -Format dd.MM.yyyy
        $nowTime = Get-Date -Format HH:mm:ss
        Write-Host $nowDate $nowTime $string
        Add-Content -LiteralPath $LogPath -Value "$nowDate $nowTime $string"
    }
}

function Get-Timewindow
{
    $Now = Get-Date
    if (($Now.Hour -ge 7) -and ($Now.Hour -le 19))
    {
        Write-Log 'It is daytime. Check if System was just getting installed.'
        $InstallDate = ([WMI]'').ConvertToDateTime((Get-WmiObject Win32_OperatingSystem).InstallDate)
        $OneDay = New-TimeSpan -Days 1

        if ((($Now) -$InstallDate) -lt $OneDay)
        {
            Write-Log 'OS installation time is not older than 1 day. Windows Updates must be installed. Continue...'
        }
        else
        {
            Write-Log 'OS installation time is older than 1 day. Doing nothing because its day.'
            Write-Log '***** END *****'
            exit 0
        }
    }
    else
    {
        Write-Log 'It is night. Continue...'
    }
}

function Get-Rebootrequired
{
    $objSystemInfo= New-Object -ComObject 'Microsoft.Update.SystemInfo'
    $RebootRequired = $objSystemInfo.RebootRequired
    if ($RebootRequired -eq $true)
    {
        Write-Log 'Need to reboot, rebooting...'
        exit 3010
    }
    else
    {
        Write-Log 'No need to reboot.'
    }			
}

function Get-InstallerStatus {
    $Busy = $true
    $lastWriteTimeCBSLos = (Get-Item C:\Windows\Logs\CBS\CBS.log).LastWriteTime
    $TimespanOneMinute = New-TimeSpan -Minutes 1
    while ($Busy -eq $true)
    {
        if (((Get-Date) -$lastWriteTimeCBSLos) -gt $TimespanOneMinute) {
            $Busy = $false
        }
        else {
            Write-Log 'Waiting for Trusted Installer...'
            Start-Sleep -Seconds 10
        }
    }
    
}


$LogPath = "$env:SystemDrive\tmp\windows-update-opsi.log"
$FirstRun = Test-Path -Path $LogPath

Write-Log '***** START *****'

# Auskommetniert für OPSI-Once-Script 
# Get-Timewindow
Get-Rebootrequired
Get-InstallerStatus

Write-Log 'Searching for new Updates...'

#GUI bauen
[System.Windows.Forms.Application]::EnableVisualStyles()
Add-Type -AssemblyName System.Windows.Forms
$Form = New-Object system.Windows.Forms.Form
$Form.Text = 'Windows-Update-Status'
$Form.Width = 430
$Form.Height = 100
$Form.TopMost = $True
$Form.AutoSizeMode = 'GrowAndShrink'
$Form.MinimizeBox = $False
$Form.MaximizeBox = $False
$Form.WindowState = 'Normal'
$Form.SizeGripStyle = 'Hide'
$Form.ShowInTaskbar = $False
$Form.StartPosition = 'CenterScreen'
$Font = New-Object System.Drawing.Font('Arial',12)
$Form.Font = $Font
$Label = New-Object System.Windows.Forms.Label
$Label.Text = 'Suche nach Windows Updates...'
$Label.AutoSize = $True
$Form.Controls.Add($Label)
$Form.Show()
$Form.Focus()

$Session= New-Object -ComObject Microsoft.Update.Session
$Searcher= $Session.CreateUpdateSearcher()

$SearchResults = $Searcher.Search("IsInstalled=0 and Type='Software'").Updates
if ($SearchResults.Count -eq 0 -and $FirstRun -eq $true)
{
    Write-Log 'No Updates found.'
    Write-Log '***** END *****'
    $Label.Text = 'Keine neuen Updates gefunden.'
    $Form.Refresh()
    Start-Sleep -Seconds 5
    $Form.Close()
    exit 0
}

if ($SearchResults.Count -eq 0 -and $FirstRun -eq $false)
{
    Write-Log 'No Updates found, but it is the first time to search for updates. Reboot!'
    Write-Log '***** END *****'
    $Label.Text = 'Keine Updates gefunden, neuer Versuch...'
    $Form.Refresh()
    Start-Sleep -Seconds 5
    $form.Close()
    exit 3010
}

foreach ($Update in $SearchResults) {
    $TotalUpdateSize = $Update.MaxDownloadSize + $TotalUpdateSize
    Write-Log "Found KB$($update.KBArticleIDs), Size: $([math]::Round($($update.MaxDownloadSize/1MB),2).ToString('0.00').PadLeft(6)) MB, Title: $($update.Title)"
}

Write-Log "Summary: $($SearchResults.Count) new Update(s), $($($TotalUpdateSize/1MB).ToString('0.00')) MB to download."
$Label.Text = "$($SearchResults.Count) neue Update(s) gefunden."
$Form.Refresh()
Start-Sleep -Seconds 5
Write-Log 'Starting Download...'
$Label.Text = 'Starte Download.'
$Form.Refresh()
Start-Sleep -Seconds 5

# ProgressBar bauen
$ProgressBarSize = New-Object System.Drawing.Size
$ProgressBarSize.Width = 400
$ProgressBarSize.Height = 20
$ProgressBar = New-Object System.Windows.Forms.ProgressBar
$ProgressBar.Left = 5
$ProgressBar.Top = 35
$ProgressBar.Style = 'Continuous'
$ProgressBar.Value = 0
$ProgressBar.Size = $ProgressBarSize
$Form.Controls.Add($ProgressBar)

$ProgressInPercent = 0
$DownloadCount = 0
$DownloadSuccessCounter = 0
$DownloadFailedCounter = 0

foreach ($DownloadItem in $SearchResults)
{
    $DownloadCount++
    $Downloader = $Session.CreateUpdateDownloader()
    $DownloadItems = New-Object -ComObject Microsoft.Update.UpdateColl
    $DownloadItems.Add($DownloadItem)
    $Downloader.Updates = $DownloadItems
    $DownloadResult = $Downloader.Download()
    if ($DownloadResult.ResultCode -eq 2) {
        $DownloadSuccessCounter++
        Write-Log "Successfully downloaded Update $DownloadCount of $($SearchResults.Count), KB$($DownloadItem.KBArticleIDs), Size: $(($DownloadItem.MaxDownloadSize/1MB).ToString('0.00')) MB, Title: $($DownloadItem.Title)"
        $ProgressInPercent = ($DownloadCount / $($SearchResults.Count))*100
        $ProgressBar.Value = $ProgressInPercent
        $Label.Text = "Download $DownloadCount von $($SearchResults.Count) erfolgreich."
        $Form.Refresh()
    }
    else {
        $DownloadFailedCounter++
        Write-Log "Failed downloading Update $DownloadCount of $($SearchResults.Count), KB$($DownloadItem.KBArticleIDs), Title: $($DownloadItem.Title)"
        $ProgressInPercent = ($DownloadCount / $($SearchResults.Count))*100
        $ProgressBar.Value = $ProgressInPercent
        $Label.Text = "Download $DownloadCount von $($SearchResults.Count) fehlgeschlagen."
        $Form.Refresh()

    }
}
Write-Log "Summary: Successfully downloaded $DownloadSuccessCounter Updates, failed to download $DownloadFailedCounter Updates."

Write-Log 'Starting Install...'
$ProgressBar.Value = 0
$Label.Text = 'Starte Installation...'
$Form.Refresh()

$InstallCount = 0
$InstallSuccessCounter = 0
$InstallFailedCounter = 0
foreach ($InstallItem in $SearchResults)
{
    $InstallCount++
    $Installer = $Session.CreateUpdateInstaller()
    $InstallerItems = New-Object -ComObject Microsoft.Update.UpdateColl
    $InstallerItems.Add($InstallItem)
    $Installer.Updates = $InstallerItems
    $InstallResult = $Installer.Install()
    if ($InstallResult.ResultCode -eq 2) {
        $InstallSuccessCounter++
        Write-Log "Successfully installed Update $InstallCount of $($SearchResults.Count), KB$($InstallItem.KBArticleIDs), Title: $($InstallItem.Title)"
        $ProgressInPercent = ($InstallCount / $($SearchResults.Count))*100
        $ProgressBar.Value = $ProgressInPercent
        $Label.Text = "Update $InstallCount von $($SearchResults.Count) erfolgreich installiert."
        $Form.Refresh()
    }
    else {
        $InstallFailedCounter++
        Write-Log "Failed installing Update $InstallCount of $($SearchResults.Count), KB$($InstallItem.KBArticleIDs), Title: $($InstallItem.Title)"
        $ProgressInPercent = ($InstallCount / $($SearchResults.Count))*100
        $ProgressBar.Value = $ProgressInPercent
        $Label.Text = "Update $InstallCount von $($SearchResults.Count) fehlgeschlagen."
        $Form.Refresh()
    }
}
Write-Log "Summary: Successfully installed $InstallSuccessCounter Updates, failed to install $InstallFailedCounter Updates."
Write-Log 'Rebooting...'
Write-Log '***** END *****'
$Label.Text = "$InstallSuccessCounter Updates erfolgreich, $InstallFailedCounter Updates fehlgeschlagen."
$Form.Refresh()
Start-Sleep -Seconds 5
$Label.Text = 'Neustart des Systems'
$Form.Refresh()
Start-Sleep -Seconds 5
$Form.Close()
exit 3010
</code>